From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08DC3C433F5 for ; Wed, 5 Jan 2022 16:58:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242083AbiAEQ6s (ORCPT ); Wed, 5 Jan 2022 11:58:48 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:37550 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242066AbiAEQ6r (ORCPT ); Wed, 5 Jan 2022 11:58:47 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6815161808; Wed, 5 Jan 2022 16:58:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F6C0C36AE3; Wed, 5 Jan 2022 16:58:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1641401926; bh=nj0XYkQ6LnvHJBBs+nGm9cAYBsvZjDrq4Frx02B/Q6o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hIJ1ce16UzKoUTauYMLag04th28bUIExEDCZHczAbEoIhf/zWJZRd1wVhTzU79FsA pJid14yq1KSey8Y64NLpwQMbvD2NrksQFWLJPFoh2zoV3GsyH+8nkEMGWwrYA0cFvW FbxnNmxnNx9awxToxhKPd9s3oTpQIQgWFA8E4hsV4qjfxB0FgMFtwXSI7T+NgN6mxD 4moQDzBh5ODAmq1pMppIaIcYONiJzWu34OGkHWV7gN95/VDNM1w+OxM5KArO5Pa7SY C9tSAkM65X4CDZQ677WTsQk8nU7AK6m2umePFK+FHxbpPrBgY/Kqb4HsRRP1qUCICH C+aEiBo+/X91w== Date: Wed, 5 Jan 2022 16:58:41 +0000 From: Mark Brown To: madvenka@linux.microsoft.com Cc: mark.rutland@arm.com, jpoimboe@redhat.com, ardb@kernel.org, nobuta.keiya@fujitsu.com, sjitindarsingh@gmail.com, catalin.marinas@arm.com, will@kernel.org, jmorris@namei.org, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v12 07/10] arm64: Introduce stack trace reliability checks in the unwinder Message-ID: References: <0d0eb36f348fb5a6af6eb592c0525f6e94007328> <20220103165212.9303-1-madvenka@linux.microsoft.com> <20220103165212.9303-8-madvenka@linux.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="WgogfJD6sza3trQd" Content-Disposition: inline In-Reply-To: <20220103165212.9303-8-madvenka@linux.microsoft.com> X-Cookie: Byte your tongue. Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --WgogfJD6sza3trQd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jan 03, 2022 at 10:52:09AM -0600, madvenka@linux.microsoft.com wrot= e: > From: "Madhavan T. Venkataraman" >=20 > There are some kernel features and conditions that make a stack trace > unreliable. Callers may require the unwinder to detect these cases. > E.g., livepatch. Reviwed-by: Mark Brown --WgogfJD6sza3trQd Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmHVzkAACgkQJNaLcl1U h9AVKwgAgIqIcY2WT5vZQM2ns7ljRLW3rsnU+4Ed6gk1VAmondFc6isDNhiargxv T5XYbxo859VHVp2D4mBIKsL9N9x0CRWi7bS7WoBZGiKlE9DV2D8IqYAJbLQnVGB7 uLCH574vq74JAKz9ADgZCu97MMYaWdo3WYBZM3iUFBkwa9wZEPObyxccStiuWfhs /Mv2hfTkMbSH/nbw+2Y0TQ2zBgtQuGbdcx5IbcNeyM+H2V5vewMKSohc51SbOero PS/02AuX9BlBzFICAdFHJFpAobO/ez1g/tcP+oYh6VJE+UAi5WhyEi0BYowv6F+G Qyk9HqGbtWQ0T4M98jY5SROFVdAbPg== =+EKF -----END PGP SIGNATURE----- --WgogfJD6sza3trQd--